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843fecc0 RC |
1 | /*** |
2 | This file is part of systemd | |
3 | ||
4 | Copyright 2014 Ronny Chevalier | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
b5efdb8a | 20 | #include "alloc-util.h" |
843fecc0 | 21 | #include "compress.h" |
3ffd4af2 | 22 | #include "fd-util.h" |
0d39fa9c | 23 | #include "fileio.h" |
843fecc0 | 24 | #include "macro.h" |
3df3e884 | 25 | #include "random-util.h" |
3ffd4af2 | 26 | #include "util.h" |
843fecc0 | 27 | |
d89c8fdf ZJS |
28 | #ifdef HAVE_XZ |
29 | # define XZ_OK 0 | |
30 | #else | |
31 | # define XZ_OK -EPROTONOSUPPORT | |
32 | #endif | |
33 | ||
92261977 | 34 | #ifdef HAVE_LZ4 |
d89c8fdf ZJS |
35 | # define LZ4_OK 0 |
36 | #else | |
37 | # define LZ4_OK -EPROTONOSUPPORT | |
38 | #endif | |
39 | ||
40 | typedef int (compress_blob_t)(const void *src, uint64_t src_size, | |
fa1c4b51 | 41 | void *dst, size_t *dst_size); |
d89c8fdf | 42 | typedef int (decompress_blob_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
43 | void **dst, size_t *dst_alloc_size, |
44 | size_t* dst_size, size_t dst_max); | |
d89c8fdf | 45 | typedef int (decompress_sw_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
46 | void **buffer, size_t *buffer_size, |
47 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
48 | uint8_t extra); |
49 | ||
59f448cf LP |
50 | typedef int (compress_stream_t)(int fdf, int fdt, uint64_t max_bytes); |
51 | typedef int (decompress_stream_t)(int fdf, int fdt, uint64_t max_size); | |
d89c8fdf ZJS |
52 | |
53 | static void test_compress_decompress(int compression, | |
54 | compress_blob_t compress, | |
c552d602 ZJS |
55 | decompress_blob_t decompress, |
56 | const char *data, | |
57 | size_t data_len, | |
58 | bool may_fail) { | |
843fecc0 | 59 | char compressed[512]; |
fa1c4b51 ZJS |
60 | size_t csize = 512; |
61 | size_t usize = 0; | |
d89c8fdf ZJS |
62 | _cleanup_free_ char *decompressed = NULL; |
63 | int r; | |
64 | ||
c552d602 ZJS |
65 | log_info("/* testing %s %s blob compression/decompression */", |
66 | object_compressed_to_string(compression), data); | |
67 | ||
68 | r = compress(data, data_len, compressed, &csize); | |
69 | if (r == -ENOBUFS) { | |
da927ba9 | 70 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 71 | assert_se(may_fail); |
c552d602 | 72 | } else { |
787784c4 | 73 | assert_se(r == 0); |
c552d602 ZJS |
74 | r = decompress(compressed, csize, |
75 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 76 | assert_se(r == 0); |
c552d602 ZJS |
77 | assert_se(decompressed); |
78 | assert_se(memcmp(decompressed, data, data_len) == 0); | |
79 | } | |
d89c8fdf ZJS |
80 | |
81 | r = decompress("garbage", 7, | |
82 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 83 | assert_se(r < 0); |
d89c8fdf ZJS |
84 | |
85 | /* make sure to have the minimal lz4 compressed size */ | |
86 | r = decompress("00000000\1g", 9, | |
87 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 88 | assert_se(r < 0); |
d89c8fdf ZJS |
89 | |
90 | r = decompress("\100000000g", 9, | |
91 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 92 | assert_se(r < 0); |
d89c8fdf ZJS |
93 | |
94 | memzero(decompressed, usize); | |
843fecc0 RC |
95 | } |
96 | ||
d89c8fdf ZJS |
97 | static void test_decompress_startswith(int compression, |
98 | compress_blob_t compress, | |
c552d602 ZJS |
99 | decompress_sw_t decompress_sw, |
100 | const char *data, | |
101 | size_t data_len, | |
102 | bool may_fail) { | |
d89c8fdf | 103 | |
843fecc0 | 104 | char compressed[512]; |
fa1c4b51 ZJS |
105 | size_t csize = 512; |
106 | size_t usize = 0; | |
d89c8fdf | 107 | _cleanup_free_ char *decompressed = NULL; |
c552d602 | 108 | int r; |
d89c8fdf | 109 | |
c552d602 ZJS |
110 | log_info("/* testing decompress_startswith with %s on %s text*/", |
111 | object_compressed_to_string(compression), data); | |
112 | ||
113 | r = compress(data, data_len, compressed, &csize); | |
114 | if (r == -ENOBUFS) { | |
da927ba9 | 115 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 116 | assert_se(may_fail); |
c552d602 ZJS |
117 | return; |
118 | } | |
787784c4 | 119 | assert_se(r == 0); |
d89c8fdf | 120 | |
d89c8fdf ZJS |
121 | assert_se(decompress_sw(compressed, |
122 | csize, | |
123 | (void **) &decompressed, | |
124 | &usize, | |
c552d602 | 125 | data, strlen(data), '\0') > 0); |
d89c8fdf ZJS |
126 | assert_se(decompress_sw(compressed, |
127 | csize, | |
128 | (void **) &decompressed, | |
129 | &usize, | |
c552d602 | 130 | data, strlen(data), 'w') == 0); |
d89c8fdf ZJS |
131 | assert_se(decompress_sw(compressed, |
132 | csize, | |
133 | (void **) &decompressed, | |
134 | &usize, | |
135 | "barbarbar", 9, ' ') == 0); | |
136 | assert_se(decompress_sw(compressed, | |
137 | csize, | |
138 | (void **) &decompressed, | |
139 | &usize, | |
c552d602 | 140 | data, strlen(data), '\0') > 0); |
843fecc0 RC |
141 | } |
142 | ||
d89c8fdf ZJS |
143 | static void test_compress_stream(int compression, |
144 | const char* cat, | |
145 | compress_stream_t compress, | |
146 | decompress_stream_t decompress, | |
147 | const char *srcfile) { | |
148 | ||
355b59e2 | 149 | _cleanup_close_ int src = -1, dst = -1, dst2 = -1; |
4b5bc539 ZJS |
150 | char pattern[] = "/tmp/systemd-test.compressed.XXXXXX", |
151 | pattern2[] = "/tmp/systemd-test.compressed.XXXXXX"; | |
355b59e2 | 152 | int r; |
d89c8fdf | 153 | _cleanup_free_ char *cmd = NULL, *cmd2; |
355b59e2 ZJS |
154 | struct stat st = {}; |
155 | ||
d89c8fdf ZJS |
156 | log_debug("/* testing %s compression */", |
157 | object_compressed_to_string(compression)); | |
158 | ||
355b59e2 ZJS |
159 | log_debug("/* create source from %s */", srcfile); |
160 | ||
161 | assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0); | |
162 | ||
163 | log_debug("/* test compression */"); | |
164 | ||
165 | assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0); | |
166 | ||
52754725 | 167 | assert_se(compress(src, dst, -1) == 0); |
355b59e2 | 168 | |
d89c8fdf ZJS |
169 | if (cat) { |
170 | assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0); | |
52754725 | 171 | assert_se(system(cmd) == 0); |
d89c8fdf | 172 | } |
355b59e2 ZJS |
173 | |
174 | log_debug("/* test decompression */"); | |
175 | ||
176 | assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0); | |
177 | ||
178 | assert_se(stat(srcfile, &st) == 0); | |
179 | ||
180 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
d89c8fdf | 181 | r = decompress(dst, dst2, st.st_size); |
0c0cdb06 | 182 | assert_se(r == 0); |
355b59e2 ZJS |
183 | |
184 | assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0); | |
185 | assert_se(system(cmd2) == 0); | |
186 | ||
187 | log_debug("/* test faulty decompression */"); | |
188 | ||
189 | assert_se(lseek(dst, 1, SEEK_SET) == 1); | |
d89c8fdf | 190 | r = decompress(dst, dst2, st.st_size); |
4b5bc539 | 191 | assert_se(r == -EBADMSG || r == 0); |
355b59e2 ZJS |
192 | |
193 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
194 | assert_se(lseek(dst2, 0, SEEK_SET) == 0); | |
d89c8fdf | 195 | r = decompress(dst, dst2, st.st_size - 1); |
0c0cdb06 | 196 | assert_se(r == -EFBIG); |
355b59e2 ZJS |
197 | |
198 | assert_se(unlink(pattern) == 0); | |
199 | assert_se(unlink(pattern2) == 0); | |
200 | } | |
201 | ||
843fecc0 | 202 | int main(int argc, char *argv[]) { |
c552d602 ZJS |
203 | const char text[] = |
204 | "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF" | |
205 | "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"; | |
206 | ||
207 | char data[512] = "random\0"; | |
355b59e2 ZJS |
208 | |
209 | log_set_max_level(LOG_DEBUG); | |
210 | ||
c552d602 ZJS |
211 | random_bytes(data + 7, sizeof(data) - 7); |
212 | ||
d89c8fdf | 213 | #ifdef HAVE_XZ |
c552d602 ZJS |
214 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, |
215 | text, sizeof(text), false); | |
216 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, | |
217 | data, sizeof(data), true); | |
218 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
219 | compress_blob_xz, decompress_startswith_xz, | |
220 | text, sizeof(text), false); | |
221 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
222 | compress_blob_xz, decompress_startswith_xz, | |
223 | data, sizeof(data), true); | |
d89c8fdf ZJS |
224 | test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat", |
225 | compress_stream_xz, decompress_stream_xz, argv[0]); | |
226 | #else | |
227 | log_info("/* XZ test skipped */"); | |
228 | #endif | |
c552d602 | 229 | |
d89c8fdf | 230 | #ifdef HAVE_LZ4 |
c552d602 ZJS |
231 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, |
232 | text, sizeof(text), false); | |
233 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, | |
234 | data, sizeof(data), true); | |
235 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
236 | compress_blob_lz4, decompress_startswith_lz4, | |
237 | text, sizeof(text), false); | |
238 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
239 | compress_blob_lz4, decompress_startswith_lz4, | |
240 | data, sizeof(data), true); | |
d89c8fdf | 241 | |
4b5bc539 | 242 | test_compress_stream(OBJECT_COMPRESSED_LZ4, "lz4cat", |
d89c8fdf ZJS |
243 | compress_stream_lz4, decompress_stream_lz4, argv[0]); |
244 | #else | |
245 | log_info("/* LZ4 test skipped */"); | |
246 | #endif | |
843fecc0 RC |
247 | |
248 | return 0; | |
249 | } |